Index: app/helpers/issues_helper.rb
===================================================================
--- app/helpers/issues_helper.rb	(revision 10483)
+++ app/helpers/issues_helper.rb	(working copy)
@@ -135,12 +135,13 @@
   end
 
   def render_custom_fields_rows(issue)
-    return if issue.custom_field_values.empty?
+    local_viewablecf=issue.viewable_custom_field_values
+    return if local_viewablecf.empty?
     ordered_values = []
-    half = (issue.custom_field_values.size / 2.0).ceil
+    half = (local_viewablecf.size / 2.0).ceil
     half.times do |i|
-      ordered_values << issue.custom_field_values[i]
-      ordered_values << issue.custom_field_values[i + half]
+      ordered_values << local_viewablecf[i]
+      ordered_values << local_viewablecf[i + half]
     end
     s = "<tr>\n"
     n = 0
Index: app/helpers/workflows_helper.rb
===================================================================
--- app/helpers/workflows_helper.rb	(revision 10483)
+++ app/helpers/workflows_helper.rb	(working copy)
@@ -25,6 +25,7 @@
   def field_permission_tag(permissions, status, field)
     name = field.is_a?(CustomField) ? field.id.to_s : field
     options = [["", ""], [l(:label_readonly), "readonly"]]
+    options << [l(:label_hidden), "hidden"] unless field_required?(field)
     options << [l(:label_required), "required"] unless field_required?(field)
 
     select_tag("permissions[#{name}][#{status.id}]", options_for_select(options, permissions[status.id][name]))
Index: app/models/workflow_permission.rb
===================================================================
--- app/models/workflow_permission.rb	(revision 10483)
+++ app/models/workflow_permission.rb	(working copy)
@@ -16,13 +16,13 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class WorkflowPermission < WorkflowRule
-  validates_inclusion_of :rule, :in => %w(readonly required)
+  validates_inclusion_of :rule, :in => %w(readonly required hidden)
   validate :validate_field_name
 
   # Replaces the workflow permissions for the given tracker and role
   #
   # Example:
-  #   WorkflowPermission.replace_permissions role, tracker, {'due_date' => {'1' => 'readonly', '2' => 'required'}}
+  #   WorkflowPermission.replace_permissions role, tracker, {'due_date' => {'1' => 'readonly', '2' => 'required', '3' => 'hidden'}}
   def self.replace_permissions(tracker, role, permissions)
     destroy_all(:tracker_id => tracker.id, :role_id => role.id)
 
Index: app/models/issue.rb
===================================================================
--- app/models/issue.rb	(revision 10483)
+++ app/models/issue.rb	(working copy)
@@ -416,6 +416,14 @@
     end
   end
 
+  # Returns the custom_field_values that can be viewed by the given user
+  # For now: just exclude Fix Info and RNs, as it is printed seperately below description.
+  def viewable_custom_field_values(user=nil)
+    custom_field_values.reject do |value|
+      hidden_attribute_names(user).include?(value.custom_field_id.to_s)
+    end
+  end
+
   # Returns the names of attributes that are read-only for user or the current user
   # For users with multiple roles, the read-only fields are the intersection of
   # read-only fields of each role
@@ -428,6 +436,11 @@
     workflow_rule_by_attribute(user).reject {|attr, rule| rule != 'readonly'}.keys
   end
 
+  # Same as above, but for hidden fields
+  def hidden_attribute_names(user=nil)
+    workflow_rule_by_attribute(user).reject {|attr, rule| rule != 'hidden'}.keys
+  end
+
   # Returns the names of required attributes for user or the current user
   # For users with multiple roles, the required fields are the intersection of
   # required fields of each role
Index: app/views/issues/_form_custom_fields.html.erb
===================================================================
--- app/views/issues/_form_custom_fields.html.erb	(revision 10483)
+++ app/views/issues/_form_custom_fields.html.erb	(working copy)
@@ -1,7 +1,7 @@
 <div class="splitcontent">
 <div class="splitcontentleft">
 <% i = 0 %>
-<% split_on = (@issue.custom_field_values.size / 2.0).ceil - 1 %>
+<% split_on = (@issue.editable_custom_field_values.size / 2.0).ceil - 1 %>
 <% @issue.editable_custom_field_values.each do |value| %>
   <p><%= custom_field_tag_with_label :issue, value, :required => @issue.required_attribute?(value.custom_field_id) %></p>
 <% if i == split_on -%>
Index: config/locales/en.yml
===================================================================
--- config/locales/en.yml	(revision 10483)
+++ config/locales/en.yml	(working copy)
@@ -867,6 +867,7 @@
   label_fields_permissions: Fields permissions
   label_readonly: Read-only
   label_required: Required
+  label_hidden: " Hidden "
   label_attribute_of_project: "Project's %{name}"
   label_attribute_of_author: "Author's %{name}"
   label_attribute_of_assigned_to: "Assignee's %{name}"